Network Working Group D. Fedyk, Ed.
Request for Comments: 5251 Nortel
Category: Standards Track Y. Rekhter, Ed.
Juniper Networks
D. Papadimitriou
Alcatel-Lucent
R. Rabbat
Google
L. Berger
LabN
July 2008
Layer 1 VPN Basic Mode
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Abstract
This document describes the Basic Mode of Layer 1 VPNs (L1VPNs).
L1VPN Basic Mode (L1VPN BM) is a port-based VPN. In L1VPN Basic
Mode, the basic unit of service is a Label Switched Path (LSP)
between a pair of customer ports within a given VPN port topology.
This document defines the operational model using either provisioning
or a VPN auto-discovery mechanism, and the signaling extensions for
the L1VPN BM.
Fedyk, et al. Standards Track [Page 1]RFC 5251 L1VPN Basic Mode July 2008Table of Contents
1. Introduction ....................................................3
1.1. Conventions Used in This Document ..........................4
2. Layer 1 VPN Service .............................................4
3. Addressing, Ports, Links, and Control Channels ..................7
3.1. Service Provider Realm .....................................7
3.2. Layer 1 Ports and Index ....................................7
3.3. Port and Index Mapping .....................................8
4. Port-Based L1VPN Basic Mode ....................................10
4.1. L1VPN Port Information Tables .............................11
4.1.1. Local Auto-Discovery Information ...................12
4.1.2. PE Remote Auto-Discovery Information ...............12
4.2. CE-to-CE LSP Establishment ................................14
4.3. Signaling .................................................15
4.3.1. Signaling Procedures ...............................15
4.3.1.1. Shuffling Sessions ........................16
4.3.1.2. Stitched or Nested Sessions ...............17
4.3.1.3. Other Signaling ...........................18
4.4. Recovery Procedures .......................................19
5. Security Considerations ........................................20
6. References .....................................................21
6.1. Normative References ......................................21
6.2. Informative References ....................................22
7. Acknowledgments ................................................23
Fedyk, et al. Standards Track [Page 2]RFC 5251 L1VPN Basic Mode July 20081. Introduction
This document describes the Basic Mode of Layer 1 VPNs (L1VPN BM)
that is outlined in [RFC4847]. The applicability of Layer 1 VPNS is
covered in [RFC5253]. In this document, we consider a layer 1
service provider network that consists of devices that support GMPLS
(e.g., Lambda Switch Capable (LSC) devices, optical cross-connects,
Synchronous Optical Network / Synchronous Digital Hierarchy
(SONET/SDH) cross-connects, etc.). We partition these devices into P
(provider) and PE (provider edge) devices. In the context of this
document we will refer to the former devices as just "P", and to the
latter devices as just "PE". The Ps are connected only to the
devices within the provider's network. The PEs are connected to the
other devices within the network (either Ps or PEs), as well as to
the devices outside of the service provider network. We'll refer to
such other devices as Customer Edge (CE) devices. An example of a CE
would be a GMPLS-enabled device that is either a router, an SDH
cross-connect, or an Ethernet switch.
[RFC4208] defines signaling from the CE to the PE. In [RFC4208], the
term "Core Node (CN)" corresponds to P and PE nodes, and the term
"Edge Node (EN)" corresponds to CE nodes. We additionally define an